Bit.



1. M. Huemzs.

BIT.

APPLICATION FILED MAY 25. 1915.

Patented Nov. 26, 1918.

urn ,M. M01 m 7 mm JOHN M. HUGHES, OF HOUSTON, PENNSYLVANIA.

BIT.

Application filed May 25, 1915.

To all whom it may concern:

Be it known that I, J OHN M. Hoar-ms, a citizen of the United States,residing at Houston, in the county of Washington and State ofPennsylvania, have invented new and useful Improvements in Bits, ofwhich the following is a specification.

The present invention relates to improvements in the construction ofbits employed upon reciprocating chains in coal cutting machines, andthe object of the invention is to provide a bit of this character whichincludes a cutting or routing finger and a cleaning finger arrangeddirectly to the rear of the cutting finger, both of said fingers beingof a substantially similar construction, wherein either of the saidfingers may be employed as a cutter, cleaner or router member inaccordance with the direction of travel of the machine upon which thebit is arranged.

Another object of the invention is to provide a cutting member adaptedto be attached to the reciprocatory chains for coal or other miningmachines including a body portion or shank having one of its ends formedwith oppositely disposed laterally arranged cutting members or bitsproper whereby the cutter may be attached to the machine and the machineoperated in one of two directions to permit of the cutting members ofthe bit operating upon the bed of coal or the like regardless of thedirection in which the machine is moved.

A further object of the invention is to provide a bit member for thereciproeatory chains of coal cutting machines that includes a shankwhich may be easily and quickly positioned upon the machine, the saidshank having a head portion providing oppositely extending cuttingmembers or bits, both the said bits being sharpened by operation uponone of the faces thereof adjacent its outer -edge, so that the saidsharpening may be accomplished in an easy and expeditious manner, andalso whereby the bit may be reversed upon the machine to bring either ofits cutting edges into action.

In the drawing:

Figure 1 is a front elevation of a bit constructed in accordance withthe present invention,

Specification of Letters Patent.

Patented Nov. 26, 1918.

Serial No. 30,400.

Fig. 2 is a top plan view of the same, and

Fig. 3 is a side elevation of the same.

Fig. 1- is a side elevation of a chain showing my bit applied theretoand Fig. 5 is a cross sectional view on the line 5-5 of Fig. 4:.

As illustrated in the drawing, the bit or cutting member includes ashank l which is preferably rectangular in cross section. This shank isformed upon one of its ends with what I will term a head and which isdesignated by the numeral 2. The head is formed with laterally extendingmembers 3 which are round upon one of their faces, as indicated by thenumeral 4:, the said rounded walls starting from a central transversegroove in the head 2, the walls of the said groove being beveledoutwardly in opposite directions, as indicated by the numerals 5, andthe laterally extending members from the terminals of the said beveledwalls 5 are inclined in opposite directions to the terminal of theextending members 3, the last mentioned curved or inclined walls beingindicated by the numeral (5. The under or lower faces of the laterallyextending members 3 are inclined downwardly from the terminals of thesaid extensions to the sides of the shank 1, as indicated by the numeral7. The lateral members provide the cutting elements of the device, andthe front face of the head, or the face thereof opposite that providedwith the rounded sides or walls 5 of the laterally extending members 3is, for a certain distance, arranged flush with the face of the shank,but is from thence beveled in opposite outward directions, as indicatedby the numerals 8, so that what I will term the outer faces of the bitsfrom the head, to a suitable distance away from their points, areinclined inwardly toward the round rear walls 4 thereof, and thelaterally extending cutting members from the points 9 thereof to theterminal of the beveled faces 8 are inclined inwardly, as at 10. Theinclined surface 10 may be formed by hammering upon the points orcutting members of the device,

and as the lateral or cutting members are arranged upon each of theopposite sides of the hits, it will be noted that the points as well asall of the corners of one of the said members may be adapted to enterand cut the strata while the peculiar formation of 'the opposite cuttingelement, serves as a known to the trade as the Sullivan coal cuttingchain machine. The chains in these machines are disposed to travel inone direction for a determined length of time but are also susceptibleto movement in a second or opposite direction. When moved in the secondor opposite direction it is necessary to change or reverse the bits orcutting elements, and with a construction as set forth it will be notedthat such a chain provided with a bit constructed in accordance with myinvention will obviate the necessity of reversing the cutting elementsor bits and likewise that when one of the cutting members or fingers ofthe improvement is not employed in cutting it is designed to clean theslack made by the other finger of the bit.

In use, a plurality of such bits are associated with a chain A as shownin Figs. 4 and 5 of the drawing, in which I have shown the bits asextending angularly from the links.

B, the bit on one link extending angularly beyond one side edge thereof,and the bit on the next adjacent link extending angularly beyond theopposite side edge. This arrangement is continued in alternationthroughout the length of the chain and provides a structure which willproduce a cut of greater width than the chain to provide clearancetherefor so that a cut of any desired depth may be made. It will be seenthat each bit will cut regardless of the direction of motion of thechain.

From the above description it will be seen that I provide a cutterhaving substantially horn-shaped bits extending laterally from its head,that the points of the said bits are each disposed an equal distancefrom the center of the shank or head and further that the said pointsproject each a similar distance from one of the faces of the tool andare parallel to the said face of the tool. The points of the bit arearranged longitudinally of the leads of the chain.

Having thus described the invention what I claim is:

1. A bit for the purpose set forth includto provide opposite angularportions, all as j and for the purpose set forth.

2. A cutting device including a substantially rectangular shankterminating in a head, and said head being formed with laterallyextending upwardly inclined bits terminating in points, the said pointsbeing disposed approximately an equal distance from the center of theshank and extending beyond the plane of the head and shank in onedirection, the pointed ends of the said members being disposed in animaginary line that is parallel with each other and parallel with theface of the shank beyond which they extend.

A bit, for the purpose set forth, comprising a shank which terminates ina head that is formed with lateral extensions and has its end wallcentrally provided with transverse depressions, the Walls of which beingbeveled in opposite directions, the upper walls for the said extensionsbeing inclined at opposite angles, the rear wall of the head andextensions being rounded in the same direction from approximately thecentral portionof the head and terminating in points which are disposedin a line with each other and which have their outer faces inclinedtoward the outer face of the head, the said outer face being beveledfrom its juncture with the points in the direction of the head and theunderface of the said extensions from the walls provided by the groovebeing inclined in opposite directions to the said points.

In testimony whereof I affix my signature in presence of two Witnesses.

JOHN M. HUGHES.

Witnesses RICHARD HUGHEs, GEORGE HOLMES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

